202results about How to "Uniform internal organization" patented technology

The extrusion apparatus for preparing superfine crystal block material has one structure comprising a die holder, a connecting seat, a conic die case, a conic die core, a wedged extruding rod with reduced extrusion force to avoid cracking of the block, a turning unit, a square vertical channel, a square horizontal channel and a product outlet. The product has high crystal grain fining and smooth surface, and the extrusion apparatus has simple structure, excellent mechanical performance, easy installation and use, and no pollution.

The invention relates to a hot upsetting process, in particular to a hot upsetting process for a cast ingot with a large height to diameter ratio for an ultra large ring forging. The process is characterized by comprising the following steps of: 1) hanging a heated high-temperature cast ingot with a large height to diameter ratio on a lower female die; 2) adjusting the position of an upper male die so as to ensure that the central line of the upper male die is coincided with the central lines of the cast ingot and the lower female die; 3) driving the upper male die to move downward by using a power mechanism; 4) further moving the upper male die downward so as to continuously decrease the height to diameter ratio of the cast ingot; 5) reversing the cast ingot which is in a contact molding state by hot upsetting, replacing the lower female die by using a flat plate die and further lowering the upper male die; and 6) replacing the upper male die by using a flat plate die and further lowering the upper male die until the cast ingot is upset to a cast ingot with a required blank height and size so as to obtain an upset blank. On the premise of ensuring that the hot upsetting process of the cast ingot with the large height to diameter ratio is performed successfully, the process also ensures the stress, uniform strain distribution, small bulge and uniform internal structure of the unset blank after upsetting is finished and provides an unset blank with high performance for the manufacturing of a subsequent forging.

The invention relates to a hard alloy for a low-load high-speed punching precision mold. The hard alloy is prepared from the following components in percentage by mass: 62.09% to 63.49% of fine grain WC (Wolfram Carbide), 26.61% to 27.21% of coarse grain WC, 5.21% to 7.10% of Co powder, 2.47% to 3.87% of Ni powder and 0.8% to 1.3% of Cr3C2; the grain size of the fine grain WC is 0.9 to 1.5 microns; the grain size of the coarse grain WC is 1.9 to 2.8 microns. The hard alloy disclosed by the invention has the advantages of higher hardness, higher bending strength, better fracture toughness and good chemical resistance, is suitable for precision grinding and WEDM (Wire Electrical Discharge Machining) to manufacture high-grade precision punching mold components and parts, and can be used for low-load high-speed punching high-grade precision punching molds.

The invention provides a tantalum target and a manufacturing method thereof; the manufacturing method comprises the steps: firstly, performing a first forging to a tantalum ingot and obtaining a primary forged blank; performing a second forging and a first thermal treatment to the primary forged blank obtained in the previous step and obtaining a secondary forged blank; performing a third forging and a second thermal treatment to the secondary forged blank obtained in the previous step and obtaining a tertiary forged blank; performing a fourth forging and a third thermal treatment to the tertiary forged blank obtained in the previous step and obtaining a quartus forged blank; and finally, rolling and performing a fourth thermal treatment to the quartus forged blank obtained in the previous step and obtaining the tantalum target; the first forging is a rotary forging; the temperature of the first forging is 800-1400 degrees centigrade. The prepared tantalum target is uniform in texture distribution, small in grain size and capable of satisfying usage requirements in high-level semiconductor film-coating industries.

The invention provides a preparation method of a tantalum-tungsten material. The preparation method comprises the following steps of: (1) carrying out forging on a tantalum-tungsten ingot for the first time, and carrying out heat treatment on the tantalum-tungsten ingot subjected to the first-time forging for the first time; (2) carrying out forging on the tantalum-tungsten ingot obtained in the step (1) for the second time, and carrying out heat treatment on the tantalum-tungsten ingot subjected to the second-time forging for the second time; and (3) rolling the tantalum-tungsten ingot obtained in the step (2), and carrying out heat treatment on the tantalum-tungsten ingot subjected to rolling for the third time to obtain the tantalum-tungsten material. In the process of preparing the tantalum-tungsten material, two times of forging is carried out to ensure that internal crystalline gains of the ingot are fully crushed so as to obtain uniform internal organizations, and then rolling is carried out so as to ensure that the ingot is uniformly deformed in each direction, so that the material surely has uniform mechanical properties and microstructures in each direction. The invention also provides the tantalum-tungsten material prepared by the preparation method.

The invention discloses a hardening and tempering technology of an alloy-steel tube, and through the technology, the hardened and tempered alloy-steel tube is high in intensity and hardness, has good abrasion resistance and high plasticity, bears great pressure, and has small deformation and less decarburization. The technology comprises the following steps of: (1) annealing treatment: warming to 870-880 DEG C at the speed of 20-25 DEG C/minute, keeping the temperature for 35-40 minutes, and then cooling to 500 DEG C below; (2) quenching treatment: warming to 930-935 DEG C at the speed of 5-10 DEG C/minute, keeping the temperature for 50-60 minutes, then cooling rapidly at the speed of 190-200 DEG C/second to 320-325 DEG C, and cooling naturally to 30-40 DEG C; and (3) tempering treatment: warming to 500-510 DEG C at the speed of 5-10 DEG C/minute, then keeping the temperature for 230-240 minutes, and then cooling naturally to room temperature, thus the hardened and tempered alloy-steel tube is high in intensity and hardness, has good abrasion resistance and high plasticity, bears great pressure, and has small deformation and less decarburization. The hardening and tempering technology of the alloy-steel tube provided by the invention is mainly applied to the hardening and tempering of the alloy-steel tube for a hydraulic cylinder barrel.

The invention provides a production method of a nickel target and a nickel target component. The production method of the nickel target comprises the following steps of providing a nickel ingot; performing hot forging on the nickel ingot to form a first nickel target blank; performing first heat treatment on the first nickel target blank to form a second nickel target blank, wherein the temperature of the first heat treatment is 450-550 DEG C, and the temperature is maintained for 1-2 hours; after the first heat treatment, performing hot rolling on the second nickel target blank to form a third nickel target blank; performing second heat treatment on the third nickel target blank to form a fourth nickel target blank, wherein the temperature of the second heat treatment is 300-500 DEG C, and the temperature is maintained for 1-2 hours; after the second heat treatment, performing cold rolling on the fourth nickel target blank to form a fifth nickel target blank; performing third heat treatment on the fifth nickel target blank to form the nickel target, wherein the temperature of the third heat treatment is 200-300 DEG C, and the temperature is maintained for 1-2 hours. By adopting the technical scheme, the produced nickel target has relatively uniform internal organization and good magnetic property.

A high-purity oxygen-free copper tube target preparation process for sputtering, mainly used in the IC industry. Casting—heating—extrusion—primary stretching—annealing—secondary stretching—bright annealing—finishing—checking mechanical properties—storage process steps to achieve a purity of more than 99.99%, and impurities below 0.0003% P and 0.0002% Mn, Low-oxygen ultra-low impurity high-purity oxygen-free copper preparation, its purity is higher than the national standard TU1 material, with a purity of more than 99.97%, reaching the American standard C10100 standard, with a purity of more than 99.99%; processing technology research, using appropriate extrusion technology, suitable processing Rate, recrystallization annealing and other measures to make the internal structure of the material uniform and the grain size ≤ 0.080mm.

The invention provides a preparation method for aluminum silicon carbide and aluminum silicon carbide obtained with the method. The preparation method for aluminum silicon carbide comprises powder filling and aluminization, wherein in the powder filling step, a groove of an aluminum substrate is filled with powder and a powder plate is formed; an aluminum foil with the depth being 0.5 mm is laid on the surface of the powder plate; other additives except aluminum and silicon carbide are not added into aluminum silicon carbide. According to the preparation method for aluminum silicon carbide, the aluminum foil with the depth of 0.5 mm is laid on the surface of the silicon carbide powder and then aluminization is carried out, so that scouring of molten aluminum to a silicon carbide layer in an aluminization process can be prevented and an aluminum silicon carbide material obtained after the aluminization step is guaranteed to be uniform in internal structure. Moreover, the method provided by the invention keeps the bending resistance of the aluminum silicon carbide material under a condition that no additive is added, so that the thermal conductivity of the obtained aluminum silicon carbide material is increased to 250-280 W/mK.

The invention relates to a novel Al2O3/ZrO2 powder material for SLM (selective laser melting) molding and a preparation method thereof. After molding by laser melting, the powder material forms an oral use Al2O3/ZrO2 composite ceramic material which has uniform internal tissue structure and has no obvious phase segregation. According to the preparation method, an electro-magnetic induction heating furnace and a laser are used for carry out secondary preheating on a powder bed, after achieving the preset preheating temperature, the powder material is molded by laser melting. The gradient of the interior temperature and the exterior temperature of a molten pool in molding of the ceramic material can be effectively reduced, the interior thermal stress can be lowered, cracks on the surface and in the interior of the material are reduced, and the mechanical property of the material is improved. The SLM Al2O3/ZrO2 composite ceramic material molded by the powder material through the preparation method has uniform internal tissues, has no phase segregation, has no obvious cracks on the surface and in the interior, has better mechanical property, and is expected to be used as a material of all-ceramic crown, bridge and inlay to be used in clinic of oral repair.

The invention discloses a preparation method of a SiC/stainless steel composite blood vessel stent material, which comprises the steps of material proportioning, material mixing and sintering. The invention provides an optimized process for preparing the SiC/stainless steel composite blood vessel stent material by a hot pressing sintering method. The method has the advantages that the surface potential of a metal stent is effectively reduced through the good semiconductor property of ceramic whiskers, so the anti-blood-vessel-narrowing function is given to the blood vessel stent material, and simultaneously, the goal of enhancing the anti-corrosive performance of the stainless steel is also realized. The SiC/stainless steel composite materials prepared by the method provided by the invention can be widely applied to the preparation of the blood vessel stent for medical purposes.

The invention discloses a method for casting a blade, which is a method for casting blades by adopting precise casting. The method comprises the following steps: designing a die; manufacturing the die; melting raw materials; preparing blanking; centrifugally casting; cooling for the first time, molding for the second time, and cooling for the second time; trimming, and performing shot blasting; performing hot isostatic pressing. By virtue of the steps of the method, an excellent elimination factor of surface and internal defects of the blade of an engine can be guaranteed, and the internal microscopic tissues can be more uniform.

The invention discloses a thermal treatment method of a 3D printing thin-walled part with AlSi10Mg as a substrate and the 3D printing thin-walled part and belongs to the technical field of aluminum alloy thermal treatment. The thermal treatment method includes the steps that the thin-walled part is annealed, and then high-low-temperature circulating treatment is performed in the high-temperature interval with the high-temperature ranging from 160 DEG C to 190 DEG C and the low-temperature interval with the low-temperature ranging from -60 DEG C to -50 DEG C. By the adoption of the method, through annealing treatment and high-low-temperature circulating treatment, the inner structure of the thin-walled part is more even and more stable, the inner stress of the part is reduced, the stability of the size of the part at different temperatures is improved, product quality is guaranteed, and the change of the size of the part is minimum under different temperature conditions. The 3D printing thin-walled part obtained through the method can be used for products such as a helmet displayer.

The invention belongs to the technical field of forge piece forging, and particularly relates to an integral forging and forming method for a large-scale end socket forge piece of a nuclear reactor with a plurality of protruding nozzles. A cylindrical blank is prepared through implementation of the processes of removal of a head and a tail of a steel ingot, drawing out of upsetting, rolling and blanking and the like, and moulding bed formation is implemented on the cylindrical blank by adopting a flat-anvil male-die subarea rotary rolling and forging method, so that filling forming of the shapes of the nozzles of a middle prefabricated slab is achieved through a free forging method by means of a moulding bed. According to the integral forging and forming method for the large-scale end socket forge piece of the nuclear reactor with the multiple protruding nozzles, the shape and the size of the prefabricated slab can be effectively controlled, metal of the prefabricated slab is reasonably dispersed, and the situations that the internal organization is even, forming process line is distinct, the fibrous structure is good, and the contour shape is intact are achieved. Hot stamping technology deformation belongs to the scope of large displacement and small strain in nature, and the needed press machine loading force is small; hot stamping integral forming is easy to control the shape of a big end socket forge piece product, the heat loss in the forming process of the big end socket forge piece product is small, the heating temperature of a blank is low, the time is short, so that finish-forging formed grains are controlled to grow up, and the product quality is guaranteed.

The invention relates to the technical field of water wiping devices for casting hard aluminum alloy cast ingots, in particular to a water wiping device for casting hard aluminum alloy. According to the water wiping device for casting the hard aluminum alloy, the water wiping device is arranged below a crystallizer, water wiping rings with the shape of openings identical to that of the section of a cast ingot are arranged, and the water wiping device comprises a fixing device, a water wiping device frame, the water wiping rings and drainage openings. One end of the fixing device is connected with the outer wall of the water wiping device frame, and the other end of the fixing device is provided and connected with the crystallizer. The water wiping rings are arranged at the bottom end of the water wiping device frame, and the drainage openings are formed in the side wall of the water wiping device frame. The integral type water wiping device frame and the high temperature resisting fluororubber water wiping rings are adopted, the water sealing performance is increased, it is guaranteed that in the casting process, after the cast ingot passes through the water wiping device, cooling water cannot be leaked out of clearances to flow to the surface of the iron casting, and local supercooling of the cast ingot cannot occur, the probability that the cast ingot is cracked can be greatly lowered, the casting success rate of hard aluminum and superhard aluminum alloy slab ingots or round ingots is improved, and the water wiping device is suitable for casting the hard aluminum alloy cast ingot of the large specification.

The invention discloses a rolling forming method of a constructional steel special-shaped section ring element and aims to roll a complex special-shaped section ring-type element which is complete in appearance, high in size accuracy and good in structure and performance, and is distributed along the external shape of the element. The technical scheme is that after being heated, constructional steel bar materials which are discharged according to specifications are formed into a rectangular pre-rolling semi-finished product through upsetting, punching and looping rolling; after being heated, the rectangular pre-rolling semi-finished product is rolled into a special-shaped pre-rolling semi-finished product by a pre-rolling inner forming module and a pre-rolling outer forming module in a pre-rolling special-shaped hole pattern, wherein the shape of the special-shaped pre-rolling semi-finished products are opposite to that of a finished rolling special-shaped section ring element; after being heated, the special-shaped pre-rolling semi-finished product is rolled into a special-shaped section ring element by a finished inner forming module and a finished rolling outer forming module, in the rolling process, the special-shaped pre-rolling semi-finished product widens along a radial direction in the finished rolling groove, and the metal inside the special-shaped pre-rolling semi-finished product flows from a place with more metal to a place with less metal according to preset volume flow rates. The ring element is mainly used for barrel-type revolved bodies of an aviation aircraft.

The invention discloses an injection forming method of a soft magnetic ferrite material.The method comprises the following steps of: 1) powder preparation: mixing and milling ferrite powder at one time, after dryness, presintering the powder, crushing the presintered powder for secondary mixing and milling, and performing drying treatment, 2) mixing and granulation: uniformly mixing the powder obtained in Step 1) with an adhesive, mixing to form a mixture, crushing the mixture, 3) injection forming: heating the crushed mixture, injecting into a mold cavity under a pressure condition, opening a mold for cooling, then obtaining a forming body, 4) degreasing: putting the forming body in trichloro ethylene for degreasing, drying, and then performing heat degreasing, and 5) sintering: sintering the degreased forming body to form the soft magnetic ferrite material.The method is suitable for preparing middle and small high-precision ferrite core devices in complicated shapes, and the prepared soft magnetic ferrite material has the characteristics of large and uniform density, uniform internal structure, high mechanical strength and relatively low iron loss.